Giant Axial Dielectric Response in Water-Filled Nanotubes and Effective Electrostatic Ion–Ion Interactions from a Tensorial Dielectric Model

• DOI: 10.1021/acs.jpcb.9b09269
• Publication Date: 2019-11-25T19:41:06Z
• Authors: Philip Loche; Cihan Ayaz; Alexander Schlaich; Yuki Uematsu; Roland R. Netz
• Keywords: Dielectric response

Molecular dynamics simulations in conjunction with effective medium theory are used to investigate dielectric effects water-filled nanotubes. The resulting axial constant shows a divergent increase for small nanotube radii that depends on the length, while radial decreases significantly thin By solving Poisson's equation an anisotropic cylindrical geometry, we show ion-ion interaction separations primarily constant, not one. This means electrostatic interactions nanotubes linear level enhanced due water confinement at separations, large outside dominates. If is metallic, then decays exponentially ion separation.